Road Design in Northwestern China Grassland

This paper investigates the relationship between the geometry of subgrade of different shapes and wind speed of snow-bearing wind and sand-bearing wind in pastoral area. Based on the simulation of the speed of wind blowing across the cross section of subgrade, snow protection facilities and sand control facilities with the help of FEM, the movement of snow-bearing wind and sand-bearing wind was determined. Wind speed at different points of the subgrade was measured on site by three-cup wind speed meters. Combining the simulation results and test date, reasonable cross section for pastoral roads and the reasonable position, height and modality of snow protection and sand control facilities were proposed. In this paper, finite element program, MSC.NASTRAN was employed to analyze structural responses of three-dimensional simplified pavement models of low volume pastoral roads under the quiescent loads. Firstly, the models with three load positions have been put forward according to traffic investigation. Secondly, effects of the road shoulder materials, the curb and thickness of wearing course on structural response of the pavements were studied. Finally, the test roads were constructed and detected in Inner Mongolia prairie, and typical pavement structures for low volume pastoral roads were recommended.

Language

  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; References; Tables;
  • Pagination: 12p
  • Monograph Title: TRB 86th Annual Meeting Compendium of Papers CD-ROM

Subject/Index Terms

Filing Info

  • Accession Number: 01046204
  • Record Type: Publication
  • Report/Paper Numbers: 07-0235
  • Files: TRIS, TRB
  • Created Date: Feb 8 2007 4:48PM